当p=3时,3^2+26=35是合数,当p^=3时,p可以写成p=3k土1, k是正整数,这时p^2+26=(3k土1)^2+26=9k^2土6k+27=3(3k^2土2k+9), 此数显然能被3整除且大于3,不是素数。
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本帖于 2023-11-05 20:55:46 时间, 由普通用户 万斤油 编辑
当p=3时,3^2+26=35是合数,当p^=3时,p可以写成p=3k土1, k是正整数,这时p^2+26=(3k土1)^2+26=9k^2土6k+27=3(3k^2土2k+9), 此数显然能被3整除且大于3,不是素数。
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